---
id: CVE-2026-104587
title: >-
  blob42 gosuki through commit 6e2bf34 contains a Stored Cross-Site Scripting
  (XSS) vulnerability
summary: >-
  blob42 gosuki through commit 6e2bf34 contains a Stored Cross-Site Scripting
  (XSS) vulnerability. The application uses text/template instead of
  html/template, failing to perform context-aware auto-escaping on the URL and
  DisplayURL fields…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2026-10-13'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:56:15.773'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104587'
references:
  - url: 'https://github.com/AmalJafarzade/CVE-2026-104587'
    label: cve@mitre.org
  - url: 'https://github.com/blob42/gosuki'
    label: cve@mitre.org
  - url: 'https://github.com/AmalJafarzade/CVE-2026-104587'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00205
epssPercentile: 0.10436
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/AmalJafarzade/CVE-2026-104587'
  checkedAt: '2026-10-27T20:57:13.809Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T14:47:42.601854Z'
ingestedAt: '2026-10-13T21:58:14.168Z'
---

## Overview

blob42 gosuki through commit 6e2bf34 contains a Stored Cross-Site Scripting (XSS) vulnerability. The application uses text/template instead of html/template, failing to perform context-aware auto-escaping on the URL and DisplayURL fields of bookmarks in internal/webui/templates/bookmarks.html. An attacker can craft a malicious bookmark URL containing HTML attribute-breaking payloads that execute arbitrary JavaScript in the victim's browser context when rendered in the local web interface.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.